"The only thing that I strongly feel worthwhile would be to murder as many people as possible so as to diminish the amount of consciousness in the world."

"I do not pretend to be able to prove that there is no God. I equally cannot prove that there are no Greek gods."

"The child thus comes to the conclusion that parents are apt to lie to him. If they lie in one matter, they may lie in another, so that their moral and intellectual authority is destroyed."

"War, as I remarked a moment ago, has hitherto been disappointing in this respect, but perhaps bacteriological war may prove more effective. If a Black Death could be spread throughout the world once i…"

"I believe that when I die I shall rot, and nothing of my ego will survive."